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  1. #1
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    what determines the pressure in the evaporator



    Hi all,
    I am new to the refrigeration industry.
    Can someone tell me what determines the pressure inside the evaporator ? They always say that the expansion valve has an orifice which causes a drop in pressure. Would that mean that depending on the size of the orifice, i would get a certain pressure in the evaporator ?
    Thanks



  2. #2
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    Re: what determines the pressure in the evaporator

    Quote Originally Posted by seadive View Post
    what determines the pressure inside the evaporator ?
    Basic refrigeration principles
    If the World did not Suck, We would all fall off !

  3. #3
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    Re: what determines the pressure in the evaporator

    Welcome to the forum Seadive.

    Look at the expansion device as the tap above your sink, both will regulate flow.
    Just like the opening in the tap doesn't (on it's own) regulate the water level in your sink, the expansion valve (or it's orifice) will not regulate the evaporator's pressure.

  4. #4
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    Re: what determines the pressure in the evaporator


  5. #5
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    Re: what determines the pressure in the evaporator

    Wow do I need glasses or has Gary returned to grace us with his presence

    Happy new year Gary
    If the World did not Suck, We would all fall off !

  6. #6
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    Re: what determines the pressure in the evaporator

    Happy New Year, everyone.

    Every once in awhile, I wander off and get caught up on other things. In Australia, I think they call it going walkabout.
    Last edited by Gary; 12-01-2012 at 06:48 AM.

  7. #7
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    Re: what determines the pressure in the evaporator

    going wup wup !!!!!!!
    your only as good as your last job

  8. #8
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    Re: what determines the pressure in the evaporator

    some other factors like ;expansion upstream pressure (condensing pressure),evaporating temp depending on load,compressor capacity relative to evaporator,right situation of equalizer and thermobulb,adjustment regulation of orifice.
    S.P

  9. #9
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    Re: what determines the pressure in the evaporator

    I'm confused, as I always thought it was down to the amount of energy in the refrigerant
    If the World did not Suck, We would all fall off !

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